Benjamin h



Wl TN E5 EEE (No Model.)

B. H. HADLEY.

SUEEAGE GEINDING TABLE PoE EMEEY WHEELS.

No. 280,033. Patented June 26, 1883.

vUNITED STATES PATENT OFFICE..

BENJAMIN H. HADLEY, OF PRUVI'I)l ll\'(`l l. RHODE ISLAND.

SURFACE-GRINDING TABLE FOR EMERY-WH'EElLS.

SPECIFICATION forming part of Letters Patent No. 280,033, dated June 26,1883.

Application tiled' Morell 529, IFFR. (No model.)

To all whom it may concern.-

Be it known that I, hcNJAnlN H. HAnLnv, ot` lerovidenee. in the Stateot' Rhode Island, have invented an Improvement in burt'aee- Grinding'.Ifables I'or Einer'v-lVheels, ot` whieh the tollowing is aspeeitieation.

rIhe nature ot' my invention eonsists in the eombination ot a pivotedtable with the supporting-stamt ot'an (interv-wheel in sneh a n1annerthat the table may be moved away t'rom the emery-wheel without removalor detaehment from the supporti11g-stand.

VIt also consists in a surt'aee-grimling table provided with anadjustable opening for the 1 ner'vzwheel, whereby the table mayv bereadily ade to tit wheels ot.' ditlerent thiekness.

Irligure l is a perspeetive view ot' an emery grinder provided with myimprovement. Fig. L is a vertieal seetion ot' the tal )le anditspivotstandard.

ln the aeeompanying drawings, A is the t'rame of an emery grinder.

B is the shat't, upon the ends of which the eatery-wheels are to beseeured by means ot the mits I). (t is the drivingqnille'v. and E theemery-wheel.

',Ihe surfaee-grinding table F is provided with an opening, (t,extending to the edge ot the table, and adapted to reeeive the slidingpieee H, which is held in proper position, ad jai-.ent to the side ot`the emery-wheel li by means ofthe serew I'.

Tothe slotted rest-supporting arms J J, at the side of the framel A, isattaehed the tableh o] der K by means of the bolts a a, the heads ot'which are held in a groove made in the base l.: ofthe holder. The hub bot' the holder is bored out to reeeive the hollow pivot-staunt ard L ot'the table, and to the lower side ot' the holder K, and in line with theaxis of the hub b, is seeured the step M by means of the serews e e,passing through the tlange d ofthe step. The ehainbered standard N,which is made in one pieee with the step M, is provided at its upper endwith the screw thread or nut r, adapted to receive the serew (),whieh isjournaled at the upper end of the pivotstandard, and also provided withthe milled head e.

,lhe hub ot' the holder I( is slotted eut irel v through in a vertiealdireetion between the two ears ff, and in the slot y; between the twoears l'is pivoted the pawl I bv means ot' the pivot'serew il.

The pawl I is provided with a perforation, v', adapted to reeeive theIinger ot' the operator, and is also pert'orated at j. to t'orm aehamber adapted t'or the spring l, whieh, b) bearing against theeIamp-serew. serves to press the pawl intothe longitudinal groove m,made in the pivot-standard, thus preventing thetahle from turningon itspivot. "Ihe serew Q serves to elamp the sides ol' the split hub l uponthe pivotstandar-d.` to hold the table li firmly in position. and theserew Q is operated t'or this purpose b'v means ot the wreneh n. Thetable F is seenred to the arm p, whieh enrves upward at one side ot'thestandard. and is provided with the grooves t t upon its surt'aee, inorder to provide reeesses I'or the reeeption ot' grinding dust andeiner)v I'rom the wheel, in order that the pieee ot work ma)v be made toseat properly upon the table.

Heretot'ore iu surt'aee-griuding tables t'or emer v-wheeIs the table hasbeen so eonstruet Y' ed and arranged that in order to use the wheel forother purposes it Vas neeessauv to remove the table entirelyv troni thetrame, but bv my improvement I have simpl)Y to unelamp the pivotstandardand raise the table elear ot' the wheel, as shown in dotted lines, Fig.L', b v turning the serew 0, then by inserting the linger in theperforation i ot` the pawl l. and pulling the pawl baekward against theaetion of the spring I, thus bringing the pawl out ot' the groove m ot'the pivot,-staml:\rd, thetable mayr be turned upon its pivot to anyYdesired position awa)v t'rom the emerv-wheel, at'ter whieh the wheel maybe used t'or an).v other purpose desired. and the removaLot' the tableand return ot' the same ma;Y be et't'eeted with ease and eelerity.

Il elaim as nl v vinvention- 1. The Combination ot' the eme||v-wheel IC.Snriaeegrinding table F, pivotstamtard II. screw O, holder K, and nutl'. wherelrv` the table F may he. raised by means ot' the serew androtated upon the axis ot' the pivotstandard, subst autially asdescribed.

L. Ihe eombiuation of the surt'aeergrilul-

